Question

Date 0913118 1. Two balls with charges+Q and +4Q are fixed at a separation place another charged ball Qo on the line between the two will be zero? a) Yes, but only if Qo is positive, distance of 3R. Is it possible to the two charges such that the net force on Q Yes, but only if Qo is negative Yes, independent of the sign (or value) of Q d) No, the net force can never be zero. 2. Two particles, each with charge Q, and a third particle vertices of an equilateral triangle as shown. The total force on with charge q the particle with charge q is Ton the parie w th are placed - FQ A) parallel to the left side of the triangle, B) parallel to the right side of the triangle, C) parallel to the bottom side of the triangle, perpendicular to the bottom side of the triangle, E) perpendicular to the left side of the triangle. 3. A charge Q is transferred from an initially uncharged plastic ball to an identical ball, if the total to the other? chro cond ball is 80x 101s C. How many electrons were transferred from one ball ote 4. 2. A 40-pC charge is positioned on the x axis at x 4.0 cm.Where should a -60-uC charge be placed to produce a net electric field of zero at the origin? a. -5.3 cmm b. 5.7 cnm -C 4.9 cm d. -6.0 cmm e. +6.0 cm

Answer 1

Q_+ 4 Q_3 R Two cases one + Q and other - Q case (i) + Q F_4Q leftarrow + Q rightarrow F + Q = If is possible to have zero force for + Q as in opposite elections F_Q leftarrow - Q rightarrow F_4 Q rightarrow still possible for net force to be zero as in opposite directions so option (c) yes Independent of sign.